本文選題：氧化鎢 + 復(fù)合納米材料��； 參考：《北京化工大學(xué)》2016年碩士論文

【摘要】：近年來,基于鎢的半導(dǎo)體納米材料受到人們的廣泛關(guān)注,特別是其中的氧化鎢納米材料引起了學(xué)者們的研究興趣。氧化鎢尤其是非化學(xué)計量的氧化鎢(WO2.9, WO2.83, WO2.72等)具有穩(wěn)定的結(jié)晶態(tài),擁有寬的吸收光譜,這些獨特的性質(zhì)使得氧化鎢在光催化、電化學(xué)、光熱治療和氣敏傳感等方面有廣泛的應(yīng)用前景。本文利用一步合成的方法制備出了單分散納米針狀的氧化鎢(W17047)并對反應(yīng)產(chǎn)物進行了表征,對反應(yīng)條件進行了研究,對反應(yīng)產(chǎn)物的光熱性能進行了探究。同時,利用溶劑熱合成的方法制備了W17O47@MOS2納米晶,并探究了它的電化學(xué)性能。主要成績?nèi)缦拢?、采用一步法合成了單分散的W17047針狀納米晶�？疾炝硕喾N因素對W17047納米晶形貌的影響,得到了最佳的合成條件。利用聚乙烯吡咯烷酮對得到的油相W17047納米晶進行表面功能化修飾使其由油相轉(zhuǎn)移到水相,便于生物應(yīng)用,進一步研究了它的光熱性能,發(fā)現(xiàn)在808 nm激光照射下,W17047納米材料在6分鐘的時間內(nèi)溫度最高可升高25℃,有良好的光熱效果,渴望應(yīng)用于光熱成像和光熱治療等領(lǐng)域。2、采用兩步法合成W17O47@MoS2納米晶,研究了所得納米晶的電催化性能。實驗證明所合成的納米材料具有較好的電催化析氫的性能,可能是由于MoS2被負載到納米針狀的W17047材料上,使其暴露出更多的活性位點,進而表現(xiàn)出較好的電催化析氫活性。利用該方法合成的W17O47@MoS2納米晶經(jīng)由乙酸處理后,進行了一系列的電化學(xué)性能測試。研究發(fā)現(xiàn)W17O47@MoS2納米晶的電催化析氫的效果比單純的W17047納米材料的效果好。
[Abstract]:In recent years, tungsten based semiconductor nanomaterials have attracted much attention, especially tungsten oxide nanomaterials. Tungsten oxide, especially non-stoichiometric tungsten oxide (WO _ 2. 9, WO _ 2. 83, WO2.72, etc.) has stable crystalline state and wide absorption spectrum. These unique properties make tungsten oxide photocatalytic and electrochemical. Photothermal therapy and gas sensing have wide application prospects. In this paper, monodisperse nanocrystalline tungsten oxide W17047) was prepared by one-step synthesis method. The reaction products were characterized, the reaction conditions were studied, and the photothermal properties of the reaction products were investigated. At the same time, W17O47@MOS2 nanocrystals were prepared by solvothermal synthesis and their electrochemical properties were investigated. The main achievements are as follows: 1. Monodisperse needle-like nanocrystalline W17047 was synthesized by one step method. The effects of various factors on the morphology of W17047 nanocrystalline were investigated and the optimum synthesis conditions were obtained. Poly (vinylpyrrolidone) was used to functionalize the oil phase W17047 nanocrystalline from oil phase to water phase, which was convenient for biological application. The photothermal properties of W17047 nanocrystalline were further studied. It was found that the temperature of W17047 nanomaterials could be increased by 25 鈩，

本文編號：1783021